697870656 has 168 divisors, whose sum is σ = 2318373824. Its totient is φ = 196577280.

The previous prime is 697870651. The next prime is 697870681. The reversal of 697870656 is 656078796.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (168).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (697870651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 293151 + ... + 295521.

Almost surely, 2^697870656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 697870656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1159186912).

697870656 is an abundant number, since it is smaller than the sum of its proper divisors (1620503168).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

697870656 is a wasteful number, since it uses less digits than its factorization.

697870656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2469 (or 2456 counting only the distinct ones).

The product of its (nonzero) digits is 3810240, while the sum is 54.

The square root of 697870656 is about 26417.2416425334. The cubic root of 697870656 is about 887.0027763251.

The spelling of 697870656 in words is "six hundred ninety-seven million, eight hundred seventy thousand, six hundred fifty-six".